Acetylene-lamp.



w. NCOCHRANE. ACETYLENE LAMP APPLICATION HLED NOV. 5. 1914.

1,178,496. Patented Apr. 11,191

THB COLUMBI A PLANQGRAPH (10., WASHINGTON. D. C.

. ACETYLENE-LAMP.

To all whom it may concern i g Be it known that I, WILBUR A. COCHRANE,

a citizen of the United States, residing at Sea Cliff, county of Queens, andState of New York, have invented certain new and useful Improvements in Acetylene-Lamps,

fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This lnvention relates to an lmprovement 1n mlners acetylene cap lamps. In lamps of this kind, as is well known to those skilled in the-art, the burner orifice must beexjventlon consists in providing'a construction in which the burner has a'projecting portion tremely small in diameter and, because of the necessarily small size of the lamp,-the

burner is relatively close to the gas-generriting chamber; consequently',-as the gas in the generating chamber carries a considerable quantity of floating particles of lime, or carbid, and these particles are very fine, the burner orifice is frequently obstructed by such particles.

It has been the common practice" heretofore to make an acetylene burner having its outer end formed as an inward-projecting or reentrant cone, the inner surface of which is also conical, the burner orifice being at the apex of the cone, so that'fine particles carried by the gas tend to be. deflected away from the orifice and accumulate toward the base of the cone. Such a type of burner is of the features of the present- 1nvent1on.

shown, for example, in British Patent 9762 of 1897. By this construction, only .those particles which strike exactly at the burner orifice can serve to clog the same.

lVith a construction of this kind, it is advisable to have the burner readily removable from thelamp, so that the inside of the burner may be freed from the accumulated particles which collect inside around the base of the cone. V

The present invention relates to a structure embodying a burner and a reflector so arranged and constructed that the burner, while capable of convenient removal at in-' tervals, is so securely attached to the lamp as not to be in danger of accidental displacement from the burner tube. Also, in the preferred embodiment ofthe invention, a reflector support is used and the burner is so arranged that it serves to hold the reflector and its support firmly in place.

In the best embodiment of the invention,

burner to the margin, this slot servi g to V Specification of Letters Patent. Application filed November 5, 191,4. Serial No. 870,424;

construction, any 7 I likely to be reflected to and], concentrated 1n the flame,- thereby tending present example,

admit air freely to the. conical portion of also serving for the insertion' of a tool, suchfor example as a screwdrlver, whereby the 'burner maybe readily f the burner and removed. Further, in small acetylene lamps ran s'rnrns PATENT curios,

PatentedApr. 11, 7

it has been customary to use an open'con-.

cave reflector, the burner being at or near the, center of the reflector. With such a side drafts of'air striking the reflector are to blowout the light.

7 An mportant feature ofthe present inor margin surrounding the burner orifice and extendingover there'flectorin such a wayasto act as a baflie for-any side drafts of air traveling over the surface ofjthe reflector and toward-the burner orific e,-whereby such drafts are broken up and thrown outward axially of the reflector, thus pretion, partly in section, of a miners cap lamp, provided with the present invention; Fig. 2 is'a side elevation; and Fig. 3a front view of one formof; burner embodying some Referringto th'eydrawings, 1 is thewater reservoir, Q the neck, 3 the/screw thread, l

the skirt, and 5 the carbid-receptacle, of a well known type of miners acetylene cap lamp.- From this lamp projects a burner tube 6, which, in the present example,is

larger than the burner tubes usually employed with such a type oflamp, the outer A end being screw-threaded on its exterior.

On this threaded portion is screwed a tral opening, through which the burner extends, this opening'having a less diameter than that of the: progecting portion 8.

Around the burner tube-and between the lamp body and the reflectoris placed a reflector supporting device 1 0, which, in the I is most conveniently pressed from sheet metal. This supporting device has its bottom formed concave, to generally fit the curvature of the lamp,and i PlfOYidfid wi h a plura y of openings 11 :be'inserted in the slots.

for the circulation of air, whereby the parts are kept cool. The front of the reflector supporting device has its margin formed to make a contact with the back of the reflector in such a way as to efliciently support the said reflector firmly. When the burner is inserted through the opening at the center of the reflector and is screwed firmly onto the end of the burner tube, as shown in Fig. 1, the reflector is pressed tightly against its supporting device 10, and the latter is presset against the lamp, so that the reflector is held ti htly in place and supported in such a manner that it willnot readily be bent by accidental blows.

The front end of the burner is provided with a reentrant conical. wall, as indicated at 12, the apex of the cone having a burner orifice which, in lamps of this type, is very small. Particles of carbid, or lime, escaping from the lamp into the burner tube will be carried by the outflowing gas toward the burner orifice, but, ingeneral, will not be likely to strike exactly in the orifice and hence when striking at any side thereof will be deflected toward the front of the burner and accumulate inside the same, near the base of the conical portion.

In order that the burner may be readily removed, it is so formed as to permit the application of a suitable tool for such removal. This may be done by providing the burner with a polygonal periphery to receive a wrench, or with slots for a screw-driver. Most advantageously, it may be provided with both such means, as is shown in Figs. 2 and 3.

An important feature of this invention consists in arranging the slots for the screwdriver so that they extend from the conical recess at the outer end of the burner toward the periphery of the latter, therebyserving not only to receive a screw driver but also to permit a copious 1IlflOW"Of 111' to the flame, thus insuring perfect combustion of thezacetylenegas. When it is desired to remove the burner for the purpose of cleaning it, as' by removing the accumulated carbid or lime particles, either a wrench may be applied to the burner, or a screw-driver may As this operation of cleaning-a burner does not require to be done at very frequent intervals, the inconvenience of using a tool to remove the burner is so slight as to be' negligible. On the other hand, owing to the necessity for the use of such tools, and the screw-threaded connection between j the burner and the burner-tube, the danger of an accidental removal of the burner is avoided. It will be noted that the projecting or collar portion. 8 of the burner .makes a sufficient engage ment w1th the reflector to secure the reflector-firmly in place. Also, this projecting portion 8 stands up from the reflecting surface of the reflector, so that any side drafts of air. moving along the reflecting surface will be prevented from flowing straight to the flame, and will be deflected forward so as not to act transversely on the flame. In this tor a ainst its su ort said burner having 8 7 s,

a burner-orifice and a conical recess into which the burner orifice opens at a point back of the front surface of said laterally projecting portion.

Inanacetylene cap lamp, the combination,.with the lamp-body, aJburner-tube projecting therefrom andv having an exteriorly threaded end, .a reflector provided with an openin andaa reflector support bearing against the lamp, of a burner extendin throu h the oaenino' in the reflector, said burner having interior screwthreads arranged toengage the 1 threads of; the burner and having a laterally extending portion. at-its front end arranged to engage. the outer face of the reflector to p-ressthelatter against its ,support, said burner having aburner-orificeand a conical recess into which the burnereorifice opens ata point back of the frontsurface of said laterally @projecting i portion, said burner also having a transverse. slit extending outward from said conical. recess across the laterallyprojecting portion to the periphery of the latter.

In testimony whereof, I have hereunto set my hand, in the presence of two-subscribing witnesses.

XVILBUR A. COGHRANE. Vitnesses -A. WHITE,

M.. C. MAssIE.

Gopiesofthis patent may be. obtained for five cents each, by. addressing the .Gommissioner, of Patents Washington, D. C. 

